Originally purchased a Ball lock corny from my local home brew store along with the items needed to hook up to my co2 system. Last week I found 3 cornys on CL for cheap so I called the guy and went to pick them up. I get ther and I find out these are post type kegs, but in decent condition. I had driven 30 miles, so I figured what the heck buy um. Now I have questions?? Two of the keg lids have no purge valve on the lid like my ball lock corny, how do you purge them? 1 of them has what loos like a purge valve, but no pull devise to actually purge it. It looks like an over pressure safty devise, but appears it can be removed with a square tool. Lastly they all say property of coca-cola bottling co. Am I going to have any problems there? They were 3 for $50 bucks, and initially I didnt even think to ask if they were ball lock or pin type. Any help here is appreciated.